Piston ring



M. A. DAVIS PISTON RING Original Filed Nov. 11 1920 Mark/'5 4/4? JNVENTOR.

i4 TTORNEYS lr ntentcrl (let. it, i923.

E'JOBRIE' DAVIS, 0 LOS AHGELES, CALEJEORNIA.

PEST 0H RING.

@rlginol application filed. 361' overnher 11, 1930, Serial No. 423,337. Divided and this application filed April 11, 1921. serial No. 460,584.

To all whom it may concern: extends diagonally across the ring between Be it known that l, lvlonnrs A. lDAv1s, a th respective faces of. the same. The cuts citizen of the United Stetes, residing at Los 2 land 3 also extend diagonally acrossthe 5o Angeles, in the county of Los Angeles and ring between the inner and outer peripheries o Eltatc of Galifornia, have invented new and of the same.

'nseful Improvements in Piston Rings, of The ring, as thus constructed, is so arwhich the following is a specification. ranged that when in normal position before it is the object of this invention to procompressed within a piston ring groove, the 55 vide a piston ring havingthe split therein ends of the ring are spaced apart, as clearly so so nrrnnged as to provide nn eilicient leak shown in Fig. 1. When the ring is comproof ring. This result is accomplished by pressed within its groove the split ends of so arranging the split in the piston ring, the saine will overlap, as clearly shown in that the latter, when compressed within a Figs. 3 and t and as a result the inclined to groove oic a piston, will tend to force its surfaces of the ring ends forming the split to ends out of alinement so as to more intir ridin upon one another, will cause the motely engage the side walls of the piston ends 0 the ring to tend to move out of ring groove, and also more intimately enalinement longitudinally of: the piston. The

gage the base of said piston ring groove and respective side surfaces of the piston will to the wall of the cylinder in which the piston thus be forced into more intimate contact no is received. A I with the sides of the piston ring groove.

The invention will be readily understood At the same time the ends of the piston ring from the following description of the 210- will tend to move out of alincment with recompanying drawings, in which-- lation to the circumference of the piston, to

Figure 1 is a perspective view of a piston through contact of the inclined surfaces.

2t? ring constructed in accordance with the informing the splits 2 and. v3 extending across vention, and showing itinnormal position the piston rim between its inner and outer before compressed in the groove of a piston. peripheries. his will cause more intimate Fig. 2 isa longitudinal section through at engagement of the piston ring in the base 75- cylindcr having a piston therein provided of the piston ring groove and also with the so with the improved piston rings. wall of the cylinder.

Fig. 3 is s, plan view of the piston ring Various changes may be made without doat the joint therein, showing the ends of the parting from the spirit or" the invention as ring overlapped in the compressed position claimed. so

of the ring. What is claimed is:

35 Fig. l is a detail section on the line 4-4 A piston ring comprising an annular body of Fig. 3. rectangular in cross section, said body being This invention is a divisional application provided with substantially parallel cuts er.-

of my co-pending application Serial No. tending inwardly from the opposite side 8t @3537, filed November 11, 1920, for piston faces thereof, about a quarter of the thickrinlgs. ness, and then split in a plane extending dihe piston ring is shown at 1 as or" usual agonally from the inner ends of the menconstruction, except that the split in said tioncd parallel cuts, the said cuts also on ring comprising split substantially parallel tending diagonally across the ring between to cuts 2 and 3 extending inwardly from the the inner and outer faces.

45 rcspectivefaces of the ring and circumfercn- In testimony whereof I have signed my tially chest, as clearly shown in Fig. '1. name to this specification.

These cuts are connected by 2, split 4 which MURRIS A. DAVIS 

